(* BREAKING *) icinga2: 2.4.10 -> 2.8.2
(* BREAKING *) icinga2: 2.4.10 -> 2.8.2

Breaking because of MySQL schema changes, icinga2 does not support
unattended migrations.

Added support for PostgreSQL.

ip1981/nixsap,ip1981/nixsap,ip1981/nixsap